MCC-NH Gas Fitters Practice Exam – Prep, Questions & Study Guide

Heat can significantly affect underground plastic piping if it is not properly insulated. When plastic pipes are exposed to heat, especially from direct sunlight or surrounding soils that retain heat, they can undergo thermal expansion and be subject to deformation. This can compromise the structural integrity of the pipes, leading to sagging, cracking, or even failure of the piping system. As a result, the serviceability of the pipe is impaired, which could lead to leaks or pressure loss in the gas delivery system.

Additionally, elevated temperatures can make certain types of plastic materials more pliable, increasing the risk of bending or warping. Therefore, proper insulation is critical in maintaining both the physical properties and the overall functionality of underground plastic piping systems. This understanding emphasizes the importance of proper installation and materials selection when working with gas pipelines.